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Viewing changes to soc/blackfin/bf5xx-i2s-pcm.c

  • Committer: Canonistack server
  • Date: 2015-01-22 13:04:34 UTC
  • Revision ID: david.henningsson@canonical.com-20150122130434-q48cfdp8ovzgqhe7
Test run of 623 machines: 3 failing with 3 errors and 0 warnings.

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soc/blackfin/bf5xx-i2s-pcm.c
 
1
/*
 
2
 * File:         sound/soc/blackfin/bf5xx-i2s-pcm.c
 
3
 * Author:       Cliff Cai <Cliff.Cai@analog.com>
 
4
 *
 
5
 * Created:      Tue June 06 2008
 
6
 * Description:  DMA driver for i2s codec
 
7
 *
 
8
 * Modified:
 
9
 *               Copyright 2008 Analog Devices Inc.
 
10
 *
 
11
 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
 
12
 *
 
13
 * This program is free software; you can redistribute it and/or modify
 
14
 * it under the terms of the GNU General Public License as published by
 
15
 * the Free Software Foundation; either version 2 of the License, or
 
16
 * (at your option) any later version.
 
17
 *
 
18
 * This program is distributed in the hope that it will be useful,
 
19
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
20
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
21
 * GNU General Public License for more details.
 
22
 *
 
23
 * You should have received a copy of the GNU General Public License
 
24
 * along with this program; if not, see the file COPYING, or write
 
25
 * to the Free Software Foundation, Inc.,
 
26
 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
27
 */
 
28
 
 
29
#include <linux/module.h>
 
30
#include <linux/init.h>
 
31
#include <linux/platform_device.h>
 
32
#include <linux/dma-mapping.h>
 
33
#include <linux/gfp.h>
 
34
 
 
35
#include <sound/core.h>
 
36
#include <sound/pcm.h>
 
37
#include <sound/pcm_params.h>
 
38
#include <sound/soc.h>
 
39
 
 
40
#include <asm/dma.h>
 
41
 
 
42
#include "bf5xx-sport.h"
 
43
#include "bf5xx-i2s-pcm.h"
 
44
 
 
45
static void bf5xx_dma_irq(void *data)
 
46
{
 
47
        struct snd_pcm_substream *pcm = data;
 
48
        snd_pcm_period_elapsed(pcm);
 
49
}
 
50
 
 
51
static const struct snd_pcm_hardware bf5xx_pcm_hardware = {
 
52
        .info                   = SNDRV_PCM_INFO_INTERLEAVED |
 
53
                                   SNDRV_PCM_INFO_MMAP_VALID |
 
54
                                   SNDRV_PCM_INFO_BLOCK_TRANSFER,
 
55
        .period_bytes_min       = 32,
 
56
        .period_bytes_max       = 0x10000,
 
57
        .periods_min            = 1,
 
58
        .periods_max            = PAGE_SIZE/32,
 
59
        .buffer_bytes_max       = 0x20000, /* 128 kbytes */
 
60
        .fifo_size              = 16,
 
61
};
 
62
 
 
63
static int bf5xx_pcm_hw_params(struct snd_pcm_substream *substream,
 
64
        struct snd_pcm_hw_params *params)
 
65
{
 
66
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 
67
        unsigned int buffer_size = params_buffer_bytes(params);
 
68
        struct bf5xx_i2s_pcm_data *dma_data;
 
69
 
 
70
        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
71
 
 
72
        if (dma_data->tdm_mode)
 
73
                buffer_size = buffer_size / params_channels(params) * 8;
 
74
 
 
75
        return snd_pcm_lib_malloc_pages(substream, buffer_size);
 
76
}
 
77
 
 
78
static int bf5xx_pcm_hw_free(struct snd_pcm_substream *substream)
 
79
{
 
80
        snd_pcm_lib_free_pages(substream);
 
81
 
 
82
        return 0;
 
83
}
 
84
 
 
85
static int bf5xx_pcm_prepare(struct snd_pcm_substream *substream)
 
86
{
 
87
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 
88
        struct snd_pcm_runtime *runtime = substream->runtime;
 
89
        struct sport_device *sport = runtime->private_data;
 
90
        int period_bytes = frames_to_bytes(runtime, runtime->period_size);
 
91
        struct bf5xx_i2s_pcm_data *dma_data;
 
92
 
 
93
        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
94
 
 
95
        if (dma_data->tdm_mode)
 
96
                period_bytes = period_bytes / runtime->channels * 8;
 
97
 
 
98
        pr_debug("%s enter\n", __func__);
 
99
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 
100
                sport_set_tx_callback(sport, bf5xx_dma_irq, substream);
 
101
                sport_config_tx_dma(sport, runtime->dma_area,
 
102
                        runtime->periods, period_bytes);
 
103
        } else {
 
104
                sport_set_rx_callback(sport, bf5xx_dma_irq, substream);
 
105
                sport_config_rx_dma(sport, runtime->dma_area,
 
106
                        runtime->periods, period_bytes);
 
107
        }
 
108
 
 
109
        return 0;
 
110
}
 
111
 
 
112
static int bf5xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 
113
{
 
114
        struct snd_pcm_runtime *runtime = substream->runtime;
 
115
        struct sport_device *sport = runtime->private_data;
 
116
        int ret = 0;
 
117
 
 
118
        pr_debug("%s enter\n", __func__);
 
119
        switch (cmd) {
 
120
        case SNDRV_PCM_TRIGGER_START:
 
121
                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 
122
                        sport_tx_start(sport);
 
123
                else
 
124
                        sport_rx_start(sport);
 
125
                break;
 
126
        case SNDRV_PCM_TRIGGER_STOP:
 
127
        case SNDRV_PCM_TRIGGER_SUSPEND:
 
128
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 
129
                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 
130
                        sport_tx_stop(sport);
 
131
                else
 
132
                        sport_rx_stop(sport);
 
133
                break;
 
134
        default:
 
135
                ret = -EINVAL;
 
136
        }
 
137
 
 
138
        return ret;
 
139
}
 
140
 
 
141
static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream)
 
142
{
 
143
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 
144
        struct snd_pcm_runtime *runtime = substream->runtime;
 
145
        struct sport_device *sport = runtime->private_data;
 
146
        unsigned int diff;
 
147
        snd_pcm_uframes_t frames;
 
148
        struct bf5xx_i2s_pcm_data *dma_data;
 
149
 
 
150
        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
151
 
 
152
        pr_debug("%s enter\n", __func__);
 
153
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 
154
                diff = sport_curr_offset_tx(sport);
 
155
        } else {
 
156
                diff = sport_curr_offset_rx(sport);
 
157
        }
 
158
 
 
159
        /*
 
160
         * TX at least can report one frame beyond the end of the
 
161
         * buffer if we hit the wraparound case - clamp to within the
 
162
         * buffer as the ALSA APIs require.
 
163
         */
 
164
        if (diff == snd_pcm_lib_buffer_bytes(substream))
 
165
                diff = 0;
 
166
 
 
167
        frames = bytes_to_frames(substream->runtime, diff);
 
168
        if (dma_data->tdm_mode)
 
169
                frames = frames * runtime->channels / 8;
 
170
 
 
171
        return frames;
 
172
}
 
173
 
 
174
static int bf5xx_pcm_open(struct snd_pcm_substream *substream)
 
175
{
 
176
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 
177
        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 
178
        struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
 
179
        struct snd_pcm_runtime *runtime = substream->runtime;
 
180
        struct snd_dma_buffer *buf = &substream->dma_buffer;
 
181
        struct bf5xx_i2s_pcm_data *dma_data;
 
182
        int ret;
 
183
 
 
184
        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
185
 
 
186
        pr_debug("%s enter\n", __func__);
 
187
 
 
188
        snd_soc_set_runtime_hwparams(substream, &bf5xx_pcm_hardware);
 
189
        if (dma_data->tdm_mode)
 
190
                runtime->hw.buffer_bytes_max /= 4;
 
191
        else
 
192
                runtime->hw.info |= SNDRV_PCM_INFO_MMAP;
 
193
 
 
194
        ret = snd_pcm_hw_constraint_integer(runtime,
 
195
                        SNDRV_PCM_HW_PARAM_PERIODS);
 
196
        if (ret < 0)
 
197
                goto out;
 
198
 
 
199
        if (sport_handle != NULL) {
 
200
                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 
201
                        sport_handle->tx_buf = buf->area;
 
202
                else
 
203
                        sport_handle->rx_buf = buf->area;
 
204
 
 
205
                runtime->private_data = sport_handle;
 
206
        } else {
 
207
                pr_err("sport_handle is NULL\n");
 
208
                return -1;
 
209
        }
 
210
        return 0;
 
211
 
 
212
 out:
 
213
        return ret;
 
214
}
 
215
 
 
216
static int bf5xx_pcm_mmap(struct snd_pcm_substream *substream,
 
217
        struct vm_area_struct *vma)
 
218
{
 
219
        struct snd_pcm_runtime *runtime = substream->runtime;
 
220
        size_t size = vma->vm_end - vma->vm_start;
 
221
        vma->vm_start = (unsigned long)runtime->dma_area;
 
222
        vma->vm_end = vma->vm_start + size;
 
223
        vma->vm_flags |=  VM_SHARED;
 
224
 
 
225
        return 0 ;
 
226
}
 
227
 
 
228
static int bf5xx_pcm_copy(struct snd_pcm_substream *substream, int channel,
 
229
        snd_pcm_uframes_t pos, void *buf, snd_pcm_uframes_t count)
 
230
{
 
231
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 
232
        struct snd_pcm_runtime *runtime = substream->runtime;
 
233
        unsigned int sample_size = runtime->sample_bits / 8;
 
234
        struct bf5xx_i2s_pcm_data *dma_data;
 
235
        unsigned int i;
 
236
        void *src, *dst;
 
237
 
 
238
        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
239
 
 
240
        if (dma_data->tdm_mode) {
 
241
                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 
242
                        src = buf;
 
243
                        dst = runtime->dma_area;
 
244
                        dst += pos * sample_size * 8;
 
245
 
 
246
                        while (count--) {
 
247
                                for (i = 0; i < runtime->channels; i++) {
 
248
                                        memcpy(dst + dma_data->map[i] *
 
249
                                                sample_size, src, sample_size);
 
250
                                        src += sample_size;
 
251
                                }
 
252
                                dst += 8 * sample_size;
 
253
                        }
 
254
                } else {
 
255
                        src = runtime->dma_area;
 
256
                        src += pos * sample_size * 8;
 
257
                        dst = buf;
 
258
 
 
259
                        while (count--) {
 
260
                                for (i = 0; i < runtime->channels; i++) {
 
261
                                        memcpy(dst, src + dma_data->map[i] *
 
262
                                                sample_size, sample_size);
 
263
                                        dst += sample_size;
 
264
                                }
 
265
                                src += 8 * sample_size;
 
266
                        }
 
267
                }
 
268
        } else {
 
269
                if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 
270
                        src = buf;
 
271
                        dst = runtime->dma_area;
 
272
                        dst += frames_to_bytes(runtime, pos);
 
273
                } else {
 
274
                        src = runtime->dma_area;
 
275
                        src += frames_to_bytes(runtime, pos);
 
276
                        dst = buf;
 
277
                }
 
278
 
 
279
                memcpy(dst, src, frames_to_bytes(runtime, count));
 
280
        }
 
281
 
 
282
        return 0;
 
283
}
 
284
 
 
285
static int bf5xx_pcm_silence(struct snd_pcm_substream *substream,
 
286
        int channel, snd_pcm_uframes_t pos, snd_pcm_uframes_t count)
 
287
{
 
288
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
 
289
        struct snd_pcm_runtime *runtime = substream->runtime;
 
290
        unsigned int sample_size = runtime->sample_bits / 8;
 
291
        void *buf = runtime->dma_area;
 
292
        struct bf5xx_i2s_pcm_data *dma_data;
 
293
        unsigned int offset, samples;
 
294
 
 
295
        dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
 
296
 
 
297
        if (dma_data->tdm_mode) {
 
298
                offset = pos * 8 * sample_size;
 
299
                samples = count * 8;
 
300
        } else {
 
301
                offset = frames_to_bytes(runtime, pos);
 
302
                samples = count * runtime->channels;
 
303
        }
 
304
 
 
305
        snd_pcm_format_set_silence(runtime->format, buf + offset, samples);
 
306
 
 
307
        return 0;
 
308
}
 
309
 
 
310
static struct snd_pcm_ops bf5xx_pcm_i2s_ops = {
 
311
        .open           = bf5xx_pcm_open,
 
312
        .ioctl          = snd_pcm_lib_ioctl,
 
313
        .hw_params      = bf5xx_pcm_hw_params,
 
314
        .hw_free        = bf5xx_pcm_hw_free,
 
315
        .prepare        = bf5xx_pcm_prepare,
 
316
        .trigger        = bf5xx_pcm_trigger,
 
317
        .pointer        = bf5xx_pcm_pointer,
 
318
        .mmap           = bf5xx_pcm_mmap,
 
319
        .copy           = bf5xx_pcm_copy,
 
320
        .silence        = bf5xx_pcm_silence,
 
321
};
 
322
 
 
323
static int bf5xx_pcm_i2s_new(struct snd_soc_pcm_runtime *rtd)
 
324
{
 
325
        struct snd_card *card = rtd->card->snd_card;
 
326
        size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
 
327
        int ret;
 
328
 
 
329
        pr_debug("%s enter\n", __func__);
 
330
        ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
 
331
        if (ret)
 
332
                return ret;
 
333
 
 
334
        return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
 
335
                                SNDRV_DMA_TYPE_DEV, card->dev, size, size);
 
336
}
 
337
 
 
338
static struct snd_soc_platform_driver bf5xx_i2s_soc_platform = {
 
339
        .ops            = &bf5xx_pcm_i2s_ops,
 
340
        .pcm_new        = bf5xx_pcm_i2s_new,
 
341
};
 
342
 
 
343
static int bfin_i2s_soc_platform_probe(struct platform_device *pdev)
 
344
{
 
345
        return snd_soc_register_platform(&pdev->dev, &bf5xx_i2s_soc_platform);
 
346
}
 
347
 
 
348
static int bfin_i2s_soc_platform_remove(struct platform_device *pdev)
 
349
{
 
350
        snd_soc_unregister_platform(&pdev->dev);
 
351
        return 0;
 
352
}
 
353
 
 
354
static struct platform_driver bfin_i2s_pcm_driver = {
 
355
        .driver = {
 
356
                .name = "bfin-i2s-pcm-audio",
 
357
        },
 
358
 
 
359
        .probe = bfin_i2s_soc_platform_probe,
 
360
        .remove = bfin_i2s_soc_platform_remove,
 
361
};
 
362
 
 
363
module_platform_driver(bfin_i2s_pcm_driver);
 
364
 
 
365
MODULE_AUTHOR("Cliff Cai");
 
366
MODULE_DESCRIPTION("ADI Blackfin I2S PCM DMA module");
 
367
MODULE_LICENSE("GPL");